Browser: Trichrome and legacy target changes

Description

Screenshots

Technical details

Tests

Issues

https://gitlab.e.foundation/e/os/backlog/-/issues/3700

https://gitlab.e.foundation/e/os/backlog/-/issues/3709

10 commandments of code review

👪 ❤️ https://gitlab.e.foundation/groups/e/-/wikis/contribute/development-processes/code-review-guidelines